is a versatile bacterium found in plants, water, air, and even hospital settings. Deep taxono phylogenomics studies have revealed that is a complex of several hidden species that are not differentiated using conventional approaches. In the last two decades, there have been increasing reports of as a pathogen of diverse plants.
View Article and Find Full Text PDFThe advent of high-throughput sequencing and population genomics has enabled researchers to investigate selection pressure at hypervariable genomic loci encoding pathogen-associated molecular pattern (PAMP) molecules like lipopolysaccharide (LPS). Xanthomonas is a model and a major group of phytopathogenic bacteria that infect hosts in tissue-specific manner. Our in-depth population-based genomic investigation revealed the emergence of major lineages in two Xanthomonas pathogens that infect xylem of rice and sugarcane is associated with the acquisition and later large-scale replacement by distinct type of LPS cassettes.
View Article and Find Full Text PDFThe genus Streptococcus, a member of family Streptococcaceae, is known for its wide range of industrial, clinical and human relevance. Among the species of genus Streptococcus two members, namely Streptococcus koreensis and Streptococcus ilei, were isolated from subgingival dental plaque and human small intestinal fluid, respectively. The 16S rRNA gene sequence similarity of the type strains of these members shows a similarity of 99.
View Article and Find Full Text PDFBackground: Emergence of new variant of SARS-CoV-2, namely omicron, has posed a global concern because of its high rate of transmissibility and mutations in its genome. Researchers worldwide are trying to understand the evolution and emergence of such variants to understand the mutational cascade events.
Methods: We have considered all omicron genomes (n = 302 genomes) available till 2nd December 2021 in the public repository of GISAID along with representatives of variants of concern (VOC), i.
Based on phylo-taxonogenomics criteria, we present amended descriptions for 20 pathovars to . Incidentally, 18 were first reported from India. Seven out of twenty are classified as , 12 out of 20 as , and one as .
View Article and Find Full Text PDFBackground: COVID-19 has posed unforeseen circumstances and throttled major economies worldwide. India has witnessed two waves affecting around 31 million people representing 16% of the cases globally. To date, the epidemic waves have not been comprehensively investigated to understand pandemic progress in India.
View Article and Find Full Text PDFWe report three yellow-pigmented, Gram-negative, aerobic, rod-shaped, motile bacterial isolates designated as PPL1, PPL2, and PPL3 from healthy basmati rice seeds. Phenotypic and 16S rRNA gene sequence analysis assigned these isolates to the genus Xanthomonas. The 16S rRNA showed a 99.
View Article and Find Full Text PDFis a typical example of an environmental originated opportunistic human pathogen, which can thrive at different habitats including the human body and can cause a wide range of infections. It must cope with heat stress during transition from the environment to the human body as the physiological temperature of the human body (37 °C) is higher than environmental niches (22–30 °C). Interestingly, a phylogenetic neighbour of within genus is unable to grow at 37 °C.
View Article and Find Full Text PDFBackground: Night-soil compost (NSC) has traditionally been conserving water and a source of organic manure in northwestern Himalaya. Lately, this traditional method is declining due to modernization, its unhygienic conditions, and social apprehensions. Reduction in the age-old traditional practice has led to excessive chemical fertilizers and water shortage in the eco-sensitive region.
View Article and Find Full Text PDFThe medicinal herb, Picrorhiza kurroa Royle ex Benth has become endangered because of indiscriminate over-harvesting. Although micropropagation has been attempted for mass propagation of the plant, survival of in vitro plantlets under green house/open field poses a major challenge. Biopriming of micropropagated plantlets with plant growth-promoting rhizobacteria (PGPR) are among the successful methods to combat this problem.
View Article and Find Full Text PDFpv. () is a serious pathogen causing bacterial blight disease in rice. Population genomic studies have revealed that rampant inter-strain rather than inter-lineage differences are contributing to the evolutionary success of this pathogen.
View Article and Find Full Text PDFspecies are primarily known as a group of phytopathogens infecting diverse plants. Recent molecular studies reveal the existence of potential novel species and strains of following a nonpathogenic lifestyle. In the present study, we report whole-genome sequences of four nonpathogenic strains from citrus (NPXc).
View Article and Find Full Text PDFOrder (earlier known ) is a taxonomically complex group of a large number of gamma-proteobacteria classified in two different families, namely and . Current taxonomy is largely based on classical approaches and is devoid of whole-genome information-based analysis. In the present study, we have taken all classified and poorly described species belonging to the order to perform a phylogenetic analysis based on the 16 S rRNA sequence.
View Article and Find Full Text PDFMale sterility is of high importance in hybrid seed production of hot and sweet peppers. Genic (or nuclear) male sterility (GMS) is a simply inherited (usually monogenic recessive) and highly stable trait. However, one major disadvantage of using GMS is 1:1 segregation of male sterile to male fertile plants in every subsequent generation.
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